Double wiper lasting machine



1952 Jss. KAMBORIAN DOUBLE WIPER LASTING MACHINE 2 SHEETS-SHEET 1 Filed June 21. 1950 a& 62 [Mariam 26, 1952 J. s. KAMBORIAN 2,607,936

DOUBLE WIPER LASTING MACHINE Filed June 21, 1950 2 SHEETSSHEET 2 iwe7z hr Jae 6 Jmanm Patented Aug. 26, 1952 7 DOUBLE WIPER LASTING MACHINE Jacob S. Kamborian, West Newton, Mass. Application June 21, 1950, Serial No. 169,331

8 Claims.

This invention relates to apparatus for lasting footwear and more especially to the double-wiper lasting machine which forms the subject matter of Patent 2,467,385, granted Jacob S. Kamborian. n

In that patent there is shown a machine in which a pair of helically ribbed gripping rolls are; employed to grip and stretch the upper material. over the last and then to release the stretched upper material close to a pair of reciprocating wipers. The wipers have independent travel, are reciprocated in a substantially horizontal plane and operate in seriatim on the work. Intermediate the driven ends and the Wiping ends, the wipers are hinged so that the forward ends of the wipers have a limited amount of heightwise movement in an are about the hinges and there are cams for causing the forward ends of the wipers to be pressed downwardly as they are moved into contact with the margins of the sole thereby to press the marginal edge of the upper material into close contact with the adhesivecoated bottom of the shoe. It is the principal object of this invention to retain the desirable characteristics of that machine and in addition to provide for positive heightwise adjustment of the wipers and for changing their resistance to yielding movement under pressure of the work so as to better adapt the machine to different weights and kinds of upper material which may require a greater or less amount of wiping action.

As herein illustrated the wipers are pivotally supported at their rear ends on the machine frame so' that their forward ends can move heightwise in anarc and have near their forward April 19, 1949, to

helical feeding rolls;

ends means supporting them for heightwise adjustment and at any given adjusted position for yieldingly resisting upward pressure. To this end the forward ends of the wipers are slotted to receive a pin and the latter is fixed at its ends in a hanger. A stem fixed to the hanger extends upwardly therefrom through the frame of the machine and has on its upper end a nut rotation of which elevates or depresses the hanger.. As

2 V Fig. 1 is a side elevation of the head of the machine showing the Wipers in relation to the Fig.2 'is a vertical elevation of the wiper mechanism in section, showing the details of the adjustment for the wipers; and

Fig. 3 is a plan viewof Fig. 2 looking down at the top thereof with the cover of the housing which encloses the wipers, omitted.

Referring to Fig. 1 the machine which is very similar in many aspects to that shown in the aforementioned patent has a pedestal In on which there is a head frame [2 carrying a pair of helically ribbed gripping rolls l4-l4 for engaging the lasting margin of a shoe and stretching it over the last. A nozzle [6 also on the head frame supplies adhesive to'the margin of the shoe bottom between the rolls and the wipers the latter being in the form of a pair of reciprocation wiper blades I8I 8. Adhesive is supplied to the nozzle 16. from a reservoir 20 mounted above the feed rolls thereservoir being heated to keep the adhesive liquid and from which the adhesive gravitates to the nozzle- I6 under control of a suitable valve. The construction and operation of the tensiomng rolls, heating of the adhesive, control valve, etc. being substantially similar to that shown in the foregoing patent will not be described further herein.

On the pedestal ii! there is mounted a wiper housing 22 within which are mounted the wipers Iii-I8 the construction and operation of which will now be described;

Each wiper blade Fig. 2 has a, forward wiping end-24, a shank portion 26 and a rear end with which is integrally formed an annular. amp- The strap 28 forms one race of a ball-bearing assembly the innerrace 30 of which is fixed to an eccentric 32 mounted on a, horizontalshaft 34. The opposite ends of the shaft 34 are journaled in the walls of the housing 22. As arranged the straps 28 of the respective wiper :blades engage,

the eccentrics near the opposite ends ofthe shaft 34 and the'latter has at its mid-point a worm gear 36, Fig. 3. Below the worm gear 36 there is a second worm gear 38 fixed to a horizontal shaft 40 situated at right angles to the shaft 34 journaled in bearings 42. The shaft 4D'extends rearwardly from the housing 22 through bearings '4444 Fig. 1 and has on it a pulley 45 over which passes a belt 46 which also embraces a pulley 48. The pulley 48 is driven by a, suitable take-off from the main drive for the feed rolls. Rotation of the shaft 40 effects through the eccentrics,

gee/ s6 seriatim reciprocation of thewiper blades in the manner described in the aforementioned patent.

there is slidably mounted a cylindrical plunger. 58,

the lower end of which is bifurcated to receive the forward ends of the wiper blades. The blades are held within the bifurcated portion of the plunger 58 for both linear and angular movement by a pin 54 extending through the lower part of the plunger across the bifurcation. Slots 52 pass ing through the wiper blades permit limited linear movement of the wipers relative to the pin.

The top of the housing has an opening therein above the sleeve 68 in which there is threaded a hollow nipple 62 partly closed at its upper end and through this nipple passes a threadedstem 6 2 the lower end of which is fastened to the top of the plunger 58. On the upper end of the stem 6G there is a nut 63 having a skirt 68 which 7 engages the top of the housing and rotation of which will elevate or lower thestem 65 and hence the heightwise position of the plunger 58. Within the annular space between the inside of the nipple and the outside of the stem '64 there is placed a spring JD with one end abutting the plunger 58 and its other end abutting the upper closed end of the nipple B2. Rotation of the nipple 62 will change the length of the spring 19 and hence its resistance to yielding under pressure applied upwardly to the wipers.

As ;thus constructed it is evident that the heightwise position of the wipers can be adjusted between-limits of the bottom and top of the slot 50 and that the tension of the spring IO can be varied so that at any given heightwise position of adjustment the tension of the spring can be increased or decreased to change the resistance of the wipers. W ith the foregoing provisions for adjustment of the wipers, both as to position and as to resistance to displacement at any given position, the machine is adapted to handle substantially any kind of upper material.

It should be understood that the present disclosure is fcr the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I, claim:

1. In an apparatus for lasting shoes, a frame, means on said frame for wiping the lasting margin against the sole of the shoe which comprises a pair of movable blades, a hanger on the frame supporting said blades for both linear andangular movement, means for adjusting the heightwise position of the hanger on the frame and means at the rear ends of the blades operably connected thereto for imparting substantially linear reciprocation thereto.

2. In an apparatusfor lasting shoes, a support, means on the support for wiping the lasting margin against the sole of the shoe which comprises a pair of reciprocating blades, hanger means on the support slidably and pivotally engaging the blades near their forward ends permitting linear and angular movement of the blades, means at their rear ends for imparting linear reciprocation thereto, a screw fixed to the hanger, and a nut on 4 the screw rotation of which changes the heightwise position of the hanger on the support.

3. In an apparatus for lasting shoes, a support, means for wiping the lasting margin against the sole of the shoe which comprises a pair of reciprocating blades, hanger means slidably and pivotally engaging the blades near their forward ends permitting linear and angular movement thereof, asleeve on the support, a screw fixed to the hanger and extending freely through the sleeve, a nut on the screw engaged with the support for changing the heightwise position of the hanger on the support and a spring surrounding the screw, interposed between the hanger and the sleeve.

4. In an apparatus for lasting shoes, a support, means in the support for wiping the lasting margin against the sole of the shoe which comprises a pair of reciprocating blades, hanger means slidably and pivotally engaging the blades near their forward ends permitting linear and angular movement thereof, a threaded sleeve on the support, a screw fixed to said hanger extending freely through the sleeve, a nut on the screw engaged with the support for changing the heightwise position of the hanger on the support, and a spring surrounding the screw interposed between the hanger and the sleeve said sleeve being rotatable to change the effective length of the spring.

means on the support for wiping the lasting mar-- gin against the sole Of the shoe which comprises a pair of reciprocal blades, hanger meansnear the forward ends of the blades supporting them for linear and angular movement, common means at the rear ends of the blades for effecting seriatim reciprocation of the blades, a stem fixed to said hanger and extending upwardly therefrom through the support, a'nut at the upper end of the stem for elevating the hanger on the support and a spring surrounding the stem interposed between the hanger and the support.

6; In an apparatus for lasting shoes, a support, a pair of wiper blades mounted on the support for wiping the lasting margin against the bottom of the shoe, each wiperblade having a slot near its forward end, a pin extending through said slots, a hanger on the'support with which the ends of the pin are engaged, spring means yieldably pressing the hanger downwardly with reference to the support, means on the support, for adjusting the heightwise position of the'han'ger, means on the support for changing the length of the spring means independently of the heightwise ad ustment and means for effecting 'seriatim reciprocation of the blades. 7. In an apparatus for lasting shoes, a support, a pair of feed rolls journaled on the support, said feed rolls being cooperable progressively to grip successive increments of the lasting margin presented thereto, pull them heightwise with reference t'o the bottom of the shoe and then to release them; wipers situated close to the feed rolls at the side at which the rolls release the margin and at a level to engage the bottom of the shoe for wiping the tensioned margin as it is released by the feed rolls inwardly over the bottom of the shoe, said wipers comprising apair of independently operable blades, means supporting the blades intermediate their ends on the frame, said means being operable to effect heightwise adjustment of the blades relative to the feed rolls and hence to the bottom of the shoe, means interposed between said supporting means and a parto'f the frame y1eldably resisting heightwise displacement of the blades at any given heightwise position, means on the frame having contact with said last named means and being movable in directions to adjust the resistance of said last named means to displacement, and driving means on the frame operably connected to the feed rolls and wipers for eifecting continuous rotation of the feed rolls and seriatim reciprocation of the wipers. I

8. In an apparatus for lasting shoes, a support, a pair of feed rolls journaled on the support, said feed rolls being cooperable progressively to grip successive increments of the lasting margin presented thereto, pull them heightwise with reference to the bottom of the shoe and then to release them, wipers situated close to the feed rolls at the side at which the rolls release the margin and at a level to engage the bottom of the shoe for wiping the tensioned margin as it is released by the feed rolls inwardly over the bottom of the shoe, means on the support including an applicator situated between the feed rolls and wipers substantially at the level of the wipers for applying an adhesive to the shoe bottom for uniting the margin to the bottom, said wipers comprising a pair of independently operable blades, means supporting the blades intermediate their ends on the frame, said means being operable to eflfect heightwise adjustment of the blades relative to the feed rolls 'and hence the bottom of the shoe, means interposed between said supporting means and a part of the frame for resisting heightwise displacement thereof at any given position, means on the'frame having contact with said last named means and being movable in directions to adjust the resistance of said last' named means to displacement and driving means on the frame operably connected to the feed rolls and wipers for effecting continuous rotation of the feed rolls and seriatim reciprocation of the wipers.

' JACOB S. KAMBORIAN;

REFERENCES CITED The following references are of record in the file" of this patent: I 

